Can't access polymorphic associated model's attributes

Rails
1

Hi!!

I have a few models that use a Photo polymorphic model. It’s all good
and fine for saving or accessing the photos’ attributes via console or
inspect or logger, but if I try to call them directly in the view
with, for example, @banner.photo.file, it returns a undefined method
‘file’ etc for nil:Nil

Photos are being uploaded via paperclip and all models are set with
has_one :photo, :as => :imageable and
accepts_nested_attributes_for :photo, :allow_destroy => true. And the
Photo model is set as belongs_to :imageable, :polymorphic => true and
has_attached_file :file.

These are the columns for the Photo model:

id:integer
file:string
imageable_id:integer
imageable_type:string
file_file_name:string
file_content_type:string
file_file_size:integer
(besides created_at etc)

In my view:

<% @banners.each do |b| %>
<%= b.photo.inspect %>

<% end %>
You can see the inspect at http://bdyvu2.hospedagemweb.net/

Many thanks in advance!! Going out of my mind here!! (been at it for
days!)

2

On 26 January 2012 18:38, Yara M. [email protected] wrote:

Hi!!

I have a few models that use a Photo polymorphic model. It’s all good
and fine for saving or accessing the photos’ attributes via console or
inspect or logger, but if I try to call them directly in the view
with, for example, @banner.photo.file, it returns a undefined method
‘file’ etc for nil:Nil

That means that @banner.photo is nil. Add code to your view to test
@banner.photo before accessing @banner.photo.file.

Colin

3

oh hi!
I did… I can see it if I inspect @banner.photo, but if I try to
access it directly (using any of the name variations), it doesn’t work

  • for ANY of the attributes :confused:

thankss,
yara

4

On 2 February 2012 17:11, Yara M. [email protected] wrote:

oh hi!
I did… I can see it if I inspect @banner.photo, but if I try to
access it directly (using any of the name variations), it doesn’t work

  • for ANY of the attributes :confused:

Please quote the previous message when replying and insert your reply
into the previous message so that we don’t have to find the previous
mail to know what you are talking about. Thanks.

You say that @banner.photo works but accessing it directly does not,
what do you mean by that? You could copy and paste the console output
showing the inspect and explain what you mean by “doesn’t work”.

Colin